So how many times do I subscribe?

I have subscribed to this magazine twice and every time they update their app all my downloaded magazines disappear. I just subscribed to the magazine again and purchased the five back issues I needed, never mind that I lost the dozen of magazines on a previous update. One issue, ONE and they updated their app and again I no longer have a subscription. I am not paying for more magazines I had last week! The final insult? The back issues I PAID for are now free. Come on guys sort your app out and your business. You owe me for an online subscription that I purchased though iTunes. Crap app and crap customer service. Really I purchased back issue! Why I have no idea. They are now free! Money grab BS. Update 2016-11-26... latest "bug fix" update...still crap.

down with the opus! about Premier Guitar Magazine, v3.2